Jussi Kivilinna | 937c30d | 2011-11-09 16:26:25 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Glue Code for SSE2 assembler versions of Serpent Cipher |
| 3 | * |
| 4 | * Copyright (c) 2011 Jussi Kivilinna <jussi.kivilinna@mbnet.fi> |
| 5 | * |
| 6 | * Glue code based on aesni-intel_glue.c by: |
| 7 | * Copyright (C) 2008, Intel Corp. |
| 8 | * Author: Huang Ying <ying.huang@intel.com> |
| 9 | * |
| 10 | * CBC & ECB parts based on code (crypto/cbc.c,ecb.c) by: |
| 11 | * Copyright (c) 2006 Herbert Xu <herbert@gondor.apana.org.au> |
| 12 | * CTR part based on code (crypto/ctr.c) by: |
| 13 | * (C) Copyright IBM Corp. 2007 - Joy Latten <latten@us.ibm.com> |
| 14 | * |
| 15 | * This program is free software; you can redistribute it and/or modify |
| 16 | * it under the terms of the GNU General Public License as published by |
| 17 | * the Free Software Foundation; either version 2 of the License, or |
| 18 | * (at your option) any later version. |
| 19 | * |
| 20 | * This program is distributed in the hope that it will be useful, |
| 21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 23 | * GNU General Public License for more details. |
| 24 | * |
| 25 | * You should have received a copy of the GNU General Public License |
| 26 | * along with this program; if not, write to the Free Software |
| 27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| 28 | * USA |
| 29 | * |
| 30 | */ |
| 31 | |
| 32 | #include <linux/module.h> |
| 33 | #include <linux/hardirq.h> |
| 34 | #include <linux/types.h> |
| 35 | #include <linux/crypto.h> |
| 36 | #include <linux/err.h> |
| 37 | #include <crypto/algapi.h> |
| 38 | #include <crypto/serpent.h> |
| 39 | #include <crypto/cryptd.h> |
| 40 | #include <crypto/b128ops.h> |
| 41 | #include <crypto/ctr.h> |
Jussi Kivilinna | 1848205 | 2011-11-09 16:26:36 +0200 | [diff] [blame] | 42 | #include <crypto/lrw.h> |
Jussi Kivilinna | 5962f8b | 2011-11-09 16:26:41 +0200 | [diff] [blame] | 43 | #include <crypto/xts.h> |
Jussi Kivilinna | 937c30d | 2011-11-09 16:26:25 +0200 | [diff] [blame] | 44 | #include <asm/i387.h> |
| 45 | #include <asm/serpent.h> |
| 46 | #include <crypto/scatterwalk.h> |
| 47 | #include <linux/workqueue.h> |
| 48 | #include <linux/spinlock.h> |
| 49 | |
| 50 | struct async_serpent_ctx { |
| 51 | struct cryptd_ablkcipher *cryptd_tfm; |
| 52 | }; |
| 53 | |
| 54 | static inline bool serpent_fpu_begin(bool fpu_enabled, unsigned int nbytes) |
| 55 | { |
| 56 | if (fpu_enabled) |
| 57 | return true; |
| 58 | |
| 59 | /* SSE2 is only used when chunk to be processed is large enough, so |
| 60 | * do not enable FPU until it is necessary. |
| 61 | */ |
| 62 | if (nbytes < SERPENT_BLOCK_SIZE * SERPENT_PARALLEL_BLOCKS) |
| 63 | return false; |
| 64 | |
| 65 | kernel_fpu_begin(); |
| 66 | return true; |
| 67 | } |
| 68 | |
| 69 | static inline void serpent_fpu_end(bool fpu_enabled) |
| 70 | { |
| 71 | if (fpu_enabled) |
| 72 | kernel_fpu_end(); |
| 73 | } |
| 74 | |
| 75 | static int ecb_crypt(struct blkcipher_desc *desc, struct blkcipher_walk *walk, |
| 76 | bool enc) |
| 77 | { |
| 78 | bool fpu_enabled = false; |
| 79 | struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 80 | const unsigned int bsize = SERPENT_BLOCK_SIZE; |
| 81 | unsigned int nbytes; |
| 82 | int err; |
| 83 | |
| 84 | err = blkcipher_walk_virt(desc, walk); |
| 85 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| 86 | |
| 87 | while ((nbytes = walk->nbytes)) { |
| 88 | u8 *wsrc = walk->src.virt.addr; |
| 89 | u8 *wdst = walk->dst.virt.addr; |
| 90 | |
| 91 | fpu_enabled = serpent_fpu_begin(fpu_enabled, nbytes); |
| 92 | |
| 93 | /* Process multi-block batch */ |
| 94 | if (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS) { |
| 95 | do { |
| 96 | if (enc) |
| 97 | serpent_enc_blk_xway(ctx, wdst, wsrc); |
| 98 | else |
| 99 | serpent_dec_blk_xway(ctx, wdst, wsrc); |
| 100 | |
| 101 | wsrc += bsize * SERPENT_PARALLEL_BLOCKS; |
| 102 | wdst += bsize * SERPENT_PARALLEL_BLOCKS; |
| 103 | nbytes -= bsize * SERPENT_PARALLEL_BLOCKS; |
| 104 | } while (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS); |
| 105 | |
| 106 | if (nbytes < bsize) |
| 107 | goto done; |
| 108 | } |
| 109 | |
| 110 | /* Handle leftovers */ |
| 111 | do { |
| 112 | if (enc) |
| 113 | __serpent_encrypt(ctx, wdst, wsrc); |
| 114 | else |
| 115 | __serpent_decrypt(ctx, wdst, wsrc); |
| 116 | |
| 117 | wsrc += bsize; |
| 118 | wdst += bsize; |
| 119 | nbytes -= bsize; |
| 120 | } while (nbytes >= bsize); |
| 121 | |
| 122 | done: |
| 123 | err = blkcipher_walk_done(desc, walk, nbytes); |
| 124 | } |
| 125 | |
| 126 | serpent_fpu_end(fpu_enabled); |
| 127 | return err; |
| 128 | } |
| 129 | |
| 130 | static int ecb_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 131 | struct scatterlist *src, unsigned int nbytes) |
| 132 | { |
| 133 | struct blkcipher_walk walk; |
| 134 | |
| 135 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 136 | return ecb_crypt(desc, &walk, true); |
| 137 | } |
| 138 | |
| 139 | static int ecb_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 140 | struct scatterlist *src, unsigned int nbytes) |
| 141 | { |
| 142 | struct blkcipher_walk walk; |
| 143 | |
| 144 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 145 | return ecb_crypt(desc, &walk, false); |
| 146 | } |
| 147 | |
Jussi Kivilinna | 937c30d | 2011-11-09 16:26:25 +0200 | [diff] [blame] | 148 | static unsigned int __cbc_encrypt(struct blkcipher_desc *desc, |
| 149 | struct blkcipher_walk *walk) |
| 150 | { |
| 151 | struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 152 | const unsigned int bsize = SERPENT_BLOCK_SIZE; |
| 153 | unsigned int nbytes = walk->nbytes; |
| 154 | u128 *src = (u128 *)walk->src.virt.addr; |
| 155 | u128 *dst = (u128 *)walk->dst.virt.addr; |
| 156 | u128 *iv = (u128 *)walk->iv; |
| 157 | |
| 158 | do { |
| 159 | u128_xor(dst, src, iv); |
| 160 | __serpent_encrypt(ctx, (u8 *)dst, (u8 *)dst); |
| 161 | iv = dst; |
| 162 | |
| 163 | src += 1; |
| 164 | dst += 1; |
| 165 | nbytes -= bsize; |
| 166 | } while (nbytes >= bsize); |
| 167 | |
| 168 | u128_xor((u128 *)walk->iv, (u128 *)walk->iv, iv); |
| 169 | return nbytes; |
| 170 | } |
| 171 | |
| 172 | static int cbc_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 173 | struct scatterlist *src, unsigned int nbytes) |
| 174 | { |
| 175 | struct blkcipher_walk walk; |
| 176 | int err; |
| 177 | |
| 178 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 179 | err = blkcipher_walk_virt(desc, &walk); |
| 180 | |
| 181 | while ((nbytes = walk.nbytes)) { |
| 182 | nbytes = __cbc_encrypt(desc, &walk); |
| 183 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 184 | } |
| 185 | |
| 186 | return err; |
| 187 | } |
| 188 | |
| 189 | static unsigned int __cbc_decrypt(struct blkcipher_desc *desc, |
| 190 | struct blkcipher_walk *walk) |
| 191 | { |
| 192 | struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 193 | const unsigned int bsize = SERPENT_BLOCK_SIZE; |
| 194 | unsigned int nbytes = walk->nbytes; |
| 195 | u128 *src = (u128 *)walk->src.virt.addr; |
| 196 | u128 *dst = (u128 *)walk->dst.virt.addr; |
| 197 | u128 ivs[SERPENT_PARALLEL_BLOCKS - 1]; |
| 198 | u128 last_iv; |
| 199 | int i; |
| 200 | |
| 201 | /* Start of the last block. */ |
| 202 | src += nbytes / bsize - 1; |
| 203 | dst += nbytes / bsize - 1; |
| 204 | |
| 205 | last_iv = *src; |
| 206 | |
| 207 | /* Process multi-block batch */ |
| 208 | if (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS) { |
| 209 | do { |
| 210 | nbytes -= bsize * (SERPENT_PARALLEL_BLOCKS - 1); |
| 211 | src -= SERPENT_PARALLEL_BLOCKS - 1; |
| 212 | dst -= SERPENT_PARALLEL_BLOCKS - 1; |
| 213 | |
| 214 | for (i = 0; i < SERPENT_PARALLEL_BLOCKS - 1; i++) |
| 215 | ivs[i] = src[i]; |
| 216 | |
| 217 | serpent_dec_blk_xway(ctx, (u8 *)dst, (u8 *)src); |
| 218 | |
| 219 | for (i = 0; i < SERPENT_PARALLEL_BLOCKS - 1; i++) |
| 220 | u128_xor(dst + (i + 1), dst + (i + 1), ivs + i); |
| 221 | |
| 222 | nbytes -= bsize; |
| 223 | if (nbytes < bsize) |
| 224 | goto done; |
| 225 | |
| 226 | u128_xor(dst, dst, src - 1); |
| 227 | src -= 1; |
| 228 | dst -= 1; |
| 229 | } while (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS); |
| 230 | |
| 231 | if (nbytes < bsize) |
| 232 | goto done; |
| 233 | } |
| 234 | |
| 235 | /* Handle leftovers */ |
| 236 | for (;;) { |
| 237 | __serpent_decrypt(ctx, (u8 *)dst, (u8 *)src); |
| 238 | |
| 239 | nbytes -= bsize; |
| 240 | if (nbytes < bsize) |
| 241 | break; |
| 242 | |
| 243 | u128_xor(dst, dst, src - 1); |
| 244 | src -= 1; |
| 245 | dst -= 1; |
| 246 | } |
| 247 | |
| 248 | done: |
| 249 | u128_xor(dst, dst, (u128 *)walk->iv); |
| 250 | *(u128 *)walk->iv = last_iv; |
| 251 | |
| 252 | return nbytes; |
| 253 | } |
| 254 | |
| 255 | static int cbc_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 256 | struct scatterlist *src, unsigned int nbytes) |
| 257 | { |
| 258 | bool fpu_enabled = false; |
| 259 | struct blkcipher_walk walk; |
| 260 | int err; |
| 261 | |
| 262 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 263 | err = blkcipher_walk_virt(desc, &walk); |
| 264 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| 265 | |
| 266 | while ((nbytes = walk.nbytes)) { |
| 267 | fpu_enabled = serpent_fpu_begin(fpu_enabled, nbytes); |
| 268 | nbytes = __cbc_decrypt(desc, &walk); |
| 269 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 270 | } |
| 271 | |
| 272 | serpent_fpu_end(fpu_enabled); |
| 273 | return err; |
| 274 | } |
| 275 | |
Jussi Kivilinna | 937c30d | 2011-11-09 16:26:25 +0200 | [diff] [blame] | 276 | static inline void u128_to_be128(be128 *dst, const u128 *src) |
| 277 | { |
| 278 | dst->a = cpu_to_be64(src->a); |
| 279 | dst->b = cpu_to_be64(src->b); |
| 280 | } |
| 281 | |
| 282 | static inline void be128_to_u128(u128 *dst, const be128 *src) |
| 283 | { |
| 284 | dst->a = be64_to_cpu(src->a); |
| 285 | dst->b = be64_to_cpu(src->b); |
| 286 | } |
| 287 | |
| 288 | static inline void u128_inc(u128 *i) |
| 289 | { |
| 290 | i->b++; |
| 291 | if (!i->b) |
| 292 | i->a++; |
| 293 | } |
| 294 | |
| 295 | static void ctr_crypt_final(struct blkcipher_desc *desc, |
| 296 | struct blkcipher_walk *walk) |
| 297 | { |
| 298 | struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 299 | u8 *ctrblk = walk->iv; |
| 300 | u8 keystream[SERPENT_BLOCK_SIZE]; |
| 301 | u8 *src = walk->src.virt.addr; |
| 302 | u8 *dst = walk->dst.virt.addr; |
| 303 | unsigned int nbytes = walk->nbytes; |
| 304 | |
| 305 | __serpent_encrypt(ctx, keystream, ctrblk); |
| 306 | crypto_xor(keystream, src, nbytes); |
| 307 | memcpy(dst, keystream, nbytes); |
| 308 | |
| 309 | crypto_inc(ctrblk, SERPENT_BLOCK_SIZE); |
| 310 | } |
| 311 | |
| 312 | static unsigned int __ctr_crypt(struct blkcipher_desc *desc, |
| 313 | struct blkcipher_walk *walk) |
| 314 | { |
| 315 | struct serpent_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 316 | const unsigned int bsize = SERPENT_BLOCK_SIZE; |
| 317 | unsigned int nbytes = walk->nbytes; |
| 318 | u128 *src = (u128 *)walk->src.virt.addr; |
| 319 | u128 *dst = (u128 *)walk->dst.virt.addr; |
| 320 | u128 ctrblk; |
| 321 | be128 ctrblocks[SERPENT_PARALLEL_BLOCKS]; |
| 322 | int i; |
| 323 | |
| 324 | be128_to_u128(&ctrblk, (be128 *)walk->iv); |
| 325 | |
| 326 | /* Process multi-block batch */ |
| 327 | if (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS) { |
| 328 | do { |
| 329 | /* create ctrblks for parallel encrypt */ |
| 330 | for (i = 0; i < SERPENT_PARALLEL_BLOCKS; i++) { |
| 331 | if (dst != src) |
| 332 | dst[i] = src[i]; |
| 333 | |
| 334 | u128_to_be128(&ctrblocks[i], &ctrblk); |
| 335 | u128_inc(&ctrblk); |
| 336 | } |
| 337 | |
| 338 | serpent_enc_blk_xway_xor(ctx, (u8 *)dst, |
| 339 | (u8 *)ctrblocks); |
| 340 | |
| 341 | src += SERPENT_PARALLEL_BLOCKS; |
| 342 | dst += SERPENT_PARALLEL_BLOCKS; |
| 343 | nbytes -= bsize * SERPENT_PARALLEL_BLOCKS; |
| 344 | } while (nbytes >= bsize * SERPENT_PARALLEL_BLOCKS); |
| 345 | |
| 346 | if (nbytes < bsize) |
| 347 | goto done; |
| 348 | } |
| 349 | |
| 350 | /* Handle leftovers */ |
| 351 | do { |
| 352 | if (dst != src) |
| 353 | *dst = *src; |
| 354 | |
| 355 | u128_to_be128(&ctrblocks[0], &ctrblk); |
| 356 | u128_inc(&ctrblk); |
| 357 | |
| 358 | __serpent_encrypt(ctx, (u8 *)ctrblocks, (u8 *)ctrblocks); |
| 359 | u128_xor(dst, dst, (u128 *)ctrblocks); |
| 360 | |
| 361 | src += 1; |
| 362 | dst += 1; |
| 363 | nbytes -= bsize; |
| 364 | } while (nbytes >= bsize); |
| 365 | |
| 366 | done: |
| 367 | u128_to_be128((be128 *)walk->iv, &ctrblk); |
| 368 | return nbytes; |
| 369 | } |
| 370 | |
| 371 | static int ctr_crypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 372 | struct scatterlist *src, unsigned int nbytes) |
| 373 | { |
| 374 | bool fpu_enabled = false; |
| 375 | struct blkcipher_walk walk; |
| 376 | int err; |
| 377 | |
| 378 | blkcipher_walk_init(&walk, dst, src, nbytes); |
| 379 | err = blkcipher_walk_virt_block(desc, &walk, SERPENT_BLOCK_SIZE); |
| 380 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
| 381 | |
| 382 | while ((nbytes = walk.nbytes) >= SERPENT_BLOCK_SIZE) { |
| 383 | fpu_enabled = serpent_fpu_begin(fpu_enabled, nbytes); |
| 384 | nbytes = __ctr_crypt(desc, &walk); |
| 385 | err = blkcipher_walk_done(desc, &walk, nbytes); |
| 386 | } |
| 387 | |
| 388 | serpent_fpu_end(fpu_enabled); |
| 389 | |
| 390 | if (walk.nbytes) { |
| 391 | ctr_crypt_final(desc, &walk); |
| 392 | err = blkcipher_walk_done(desc, &walk, 0); |
| 393 | } |
| 394 | |
| 395 | return err; |
| 396 | } |
| 397 | |
Jussi Kivilinna | 1848205 | 2011-11-09 16:26:36 +0200 | [diff] [blame] | 398 | struct crypt_priv { |
| 399 | struct serpent_ctx *ctx; |
| 400 | bool fpu_enabled; |
| 401 | }; |
| 402 | |
| 403 | static void encrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) |
| 404 | { |
| 405 | const unsigned int bsize = SERPENT_BLOCK_SIZE; |
| 406 | struct crypt_priv *ctx = priv; |
| 407 | int i; |
| 408 | |
| 409 | ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes); |
| 410 | |
| 411 | if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) { |
| 412 | serpent_enc_blk_xway(ctx->ctx, srcdst, srcdst); |
| 413 | return; |
| 414 | } |
| 415 | |
| 416 | for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) |
| 417 | __serpent_encrypt(ctx->ctx, srcdst, srcdst); |
| 418 | } |
| 419 | |
| 420 | static void decrypt_callback(void *priv, u8 *srcdst, unsigned int nbytes) |
| 421 | { |
| 422 | const unsigned int bsize = SERPENT_BLOCK_SIZE; |
| 423 | struct crypt_priv *ctx = priv; |
| 424 | int i; |
| 425 | |
| 426 | ctx->fpu_enabled = serpent_fpu_begin(ctx->fpu_enabled, nbytes); |
| 427 | |
| 428 | if (nbytes == bsize * SERPENT_PARALLEL_BLOCKS) { |
| 429 | serpent_dec_blk_xway(ctx->ctx, srcdst, srcdst); |
| 430 | return; |
| 431 | } |
| 432 | |
| 433 | for (i = 0; i < nbytes / bsize; i++, srcdst += bsize) |
| 434 | __serpent_decrypt(ctx->ctx, srcdst, srcdst); |
| 435 | } |
| 436 | |
| 437 | struct serpent_lrw_ctx { |
| 438 | struct lrw_table_ctx lrw_table; |
| 439 | struct serpent_ctx serpent_ctx; |
| 440 | }; |
| 441 | |
| 442 | static int lrw_serpent_setkey(struct crypto_tfm *tfm, const u8 *key, |
| 443 | unsigned int keylen) |
| 444 | { |
| 445 | struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm); |
| 446 | int err; |
| 447 | |
| 448 | err = __serpent_setkey(&ctx->serpent_ctx, key, keylen - |
| 449 | SERPENT_BLOCK_SIZE); |
| 450 | if (err) |
| 451 | return err; |
| 452 | |
| 453 | return lrw_init_table(&ctx->lrw_table, key + keylen - |
| 454 | SERPENT_BLOCK_SIZE); |
| 455 | } |
| 456 | |
| 457 | static int lrw_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 458 | struct scatterlist *src, unsigned int nbytes) |
| 459 | { |
| 460 | struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 461 | be128 buf[SERPENT_PARALLEL_BLOCKS]; |
| 462 | struct crypt_priv crypt_ctx = { |
| 463 | .ctx = &ctx->serpent_ctx, |
| 464 | .fpu_enabled = false, |
| 465 | }; |
| 466 | struct lrw_crypt_req req = { |
| 467 | .tbuf = buf, |
| 468 | .tbuflen = sizeof(buf), |
| 469 | |
| 470 | .table_ctx = &ctx->lrw_table, |
| 471 | .crypt_ctx = &crypt_ctx, |
| 472 | .crypt_fn = encrypt_callback, |
| 473 | }; |
| 474 | int ret; |
| 475 | |
Jussi Kivilinna | d356433 | 2011-11-09 19:44:12 +0200 | [diff] [blame] | 476 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
Jussi Kivilinna | 1848205 | 2011-11-09 16:26:36 +0200 | [diff] [blame] | 477 | ret = lrw_crypt(desc, dst, src, nbytes, &req); |
| 478 | serpent_fpu_end(crypt_ctx.fpu_enabled); |
| 479 | |
| 480 | return ret; |
| 481 | } |
| 482 | |
| 483 | static int lrw_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 484 | struct scatterlist *src, unsigned int nbytes) |
| 485 | { |
| 486 | struct serpent_lrw_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 487 | be128 buf[SERPENT_PARALLEL_BLOCKS]; |
| 488 | struct crypt_priv crypt_ctx = { |
| 489 | .ctx = &ctx->serpent_ctx, |
| 490 | .fpu_enabled = false, |
| 491 | }; |
| 492 | struct lrw_crypt_req req = { |
| 493 | .tbuf = buf, |
| 494 | .tbuflen = sizeof(buf), |
| 495 | |
| 496 | .table_ctx = &ctx->lrw_table, |
| 497 | .crypt_ctx = &crypt_ctx, |
| 498 | .crypt_fn = decrypt_callback, |
| 499 | }; |
| 500 | int ret; |
| 501 | |
Jussi Kivilinna | d356433 | 2011-11-09 19:44:12 +0200 | [diff] [blame] | 502 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
Jussi Kivilinna | 1848205 | 2011-11-09 16:26:36 +0200 | [diff] [blame] | 503 | ret = lrw_crypt(desc, dst, src, nbytes, &req); |
| 504 | serpent_fpu_end(crypt_ctx.fpu_enabled); |
| 505 | |
| 506 | return ret; |
| 507 | } |
| 508 | |
| 509 | static void lrw_exit_tfm(struct crypto_tfm *tfm) |
| 510 | { |
| 511 | struct serpent_lrw_ctx *ctx = crypto_tfm_ctx(tfm); |
| 512 | |
| 513 | lrw_free_table(&ctx->lrw_table); |
| 514 | } |
| 515 | |
Jussi Kivilinna | 5962f8b | 2011-11-09 16:26:41 +0200 | [diff] [blame] | 516 | struct serpent_xts_ctx { |
| 517 | struct serpent_ctx tweak_ctx; |
| 518 | struct serpent_ctx crypt_ctx; |
| 519 | }; |
| 520 | |
| 521 | static int xts_serpent_setkey(struct crypto_tfm *tfm, const u8 *key, |
| 522 | unsigned int keylen) |
| 523 | { |
| 524 | struct serpent_xts_ctx *ctx = crypto_tfm_ctx(tfm); |
| 525 | u32 *flags = &tfm->crt_flags; |
| 526 | int err; |
| 527 | |
| 528 | /* key consists of keys of equal size concatenated, therefore |
| 529 | * the length must be even |
| 530 | */ |
| 531 | if (keylen % 2) { |
| 532 | *flags |= CRYPTO_TFM_RES_BAD_KEY_LEN; |
| 533 | return -EINVAL; |
| 534 | } |
| 535 | |
| 536 | /* first half of xts-key is for crypt */ |
| 537 | err = __serpent_setkey(&ctx->crypt_ctx, key, keylen / 2); |
| 538 | if (err) |
| 539 | return err; |
| 540 | |
| 541 | /* second half of xts-key is for tweak */ |
| 542 | return __serpent_setkey(&ctx->tweak_ctx, key + keylen / 2, keylen / 2); |
| 543 | } |
| 544 | |
| 545 | static int xts_encrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 546 | struct scatterlist *src, unsigned int nbytes) |
| 547 | { |
| 548 | struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 549 | be128 buf[SERPENT_PARALLEL_BLOCKS]; |
| 550 | struct crypt_priv crypt_ctx = { |
| 551 | .ctx = &ctx->crypt_ctx, |
| 552 | .fpu_enabled = false, |
| 553 | }; |
| 554 | struct xts_crypt_req req = { |
| 555 | .tbuf = buf, |
| 556 | .tbuflen = sizeof(buf), |
| 557 | |
| 558 | .tweak_ctx = &ctx->tweak_ctx, |
| 559 | .tweak_fn = XTS_TWEAK_CAST(__serpent_encrypt), |
| 560 | .crypt_ctx = &crypt_ctx, |
| 561 | .crypt_fn = encrypt_callback, |
| 562 | }; |
| 563 | int ret; |
| 564 | |
Jussi Kivilinna | d356433 | 2011-11-09 19:44:12 +0200 | [diff] [blame] | 565 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
Jussi Kivilinna | 5962f8b | 2011-11-09 16:26:41 +0200 | [diff] [blame] | 566 | ret = xts_crypt(desc, dst, src, nbytes, &req); |
| 567 | serpent_fpu_end(crypt_ctx.fpu_enabled); |
| 568 | |
| 569 | return ret; |
| 570 | } |
| 571 | |
| 572 | static int xts_decrypt(struct blkcipher_desc *desc, struct scatterlist *dst, |
| 573 | struct scatterlist *src, unsigned int nbytes) |
| 574 | { |
| 575 | struct serpent_xts_ctx *ctx = crypto_blkcipher_ctx(desc->tfm); |
| 576 | be128 buf[SERPENT_PARALLEL_BLOCKS]; |
| 577 | struct crypt_priv crypt_ctx = { |
| 578 | .ctx = &ctx->crypt_ctx, |
| 579 | .fpu_enabled = false, |
| 580 | }; |
| 581 | struct xts_crypt_req req = { |
| 582 | .tbuf = buf, |
| 583 | .tbuflen = sizeof(buf), |
| 584 | |
| 585 | .tweak_ctx = &ctx->tweak_ctx, |
| 586 | .tweak_fn = XTS_TWEAK_CAST(__serpent_encrypt), |
| 587 | .crypt_ctx = &crypt_ctx, |
| 588 | .crypt_fn = decrypt_callback, |
| 589 | }; |
| 590 | int ret; |
| 591 | |
Jussi Kivilinna | d356433 | 2011-11-09 19:44:12 +0200 | [diff] [blame] | 592 | desc->flags &= ~CRYPTO_TFM_REQ_MAY_SLEEP; |
Jussi Kivilinna | 5962f8b | 2011-11-09 16:26:41 +0200 | [diff] [blame] | 593 | ret = xts_crypt(desc, dst, src, nbytes, &req); |
| 594 | serpent_fpu_end(crypt_ctx.fpu_enabled); |
| 595 | |
| 596 | return ret; |
| 597 | } |
| 598 | |
Jussi Kivilinna | 937c30d | 2011-11-09 16:26:25 +0200 | [diff] [blame] | 599 | static int ablk_set_key(struct crypto_ablkcipher *tfm, const u8 *key, |
| 600 | unsigned int key_len) |
| 601 | { |
| 602 | struct async_serpent_ctx *ctx = crypto_ablkcipher_ctx(tfm); |
| 603 | struct crypto_ablkcipher *child = &ctx->cryptd_tfm->base; |
| 604 | int err; |
| 605 | |
| 606 | crypto_ablkcipher_clear_flags(child, CRYPTO_TFM_REQ_MASK); |
| 607 | crypto_ablkcipher_set_flags(child, crypto_ablkcipher_get_flags(tfm) |
| 608 | & CRYPTO_TFM_REQ_MASK); |
| 609 | err = crypto_ablkcipher_setkey(child, key, key_len); |
| 610 | crypto_ablkcipher_set_flags(tfm, crypto_ablkcipher_get_flags(child) |
| 611 | & CRYPTO_TFM_RES_MASK); |
| 612 | return err; |
| 613 | } |
| 614 | |
| 615 | static int __ablk_encrypt(struct ablkcipher_request *req) |
| 616 | { |
| 617 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
| 618 | struct async_serpent_ctx *ctx = crypto_ablkcipher_ctx(tfm); |
| 619 | struct blkcipher_desc desc; |
| 620 | |
| 621 | desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm); |
| 622 | desc.info = req->info; |
| 623 | desc.flags = 0; |
| 624 | |
| 625 | return crypto_blkcipher_crt(desc.tfm)->encrypt( |
| 626 | &desc, req->dst, req->src, req->nbytes); |
| 627 | } |
| 628 | |
| 629 | static int ablk_encrypt(struct ablkcipher_request *req) |
| 630 | { |
| 631 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
| 632 | struct async_serpent_ctx *ctx = crypto_ablkcipher_ctx(tfm); |
| 633 | |
| 634 | if (!irq_fpu_usable()) { |
| 635 | struct ablkcipher_request *cryptd_req = |
| 636 | ablkcipher_request_ctx(req); |
| 637 | |
| 638 | memcpy(cryptd_req, req, sizeof(*req)); |
| 639 | ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base); |
| 640 | |
| 641 | return crypto_ablkcipher_encrypt(cryptd_req); |
| 642 | } else { |
| 643 | return __ablk_encrypt(req); |
| 644 | } |
| 645 | } |
| 646 | |
| 647 | static int ablk_decrypt(struct ablkcipher_request *req) |
| 648 | { |
| 649 | struct crypto_ablkcipher *tfm = crypto_ablkcipher_reqtfm(req); |
| 650 | struct async_serpent_ctx *ctx = crypto_ablkcipher_ctx(tfm); |
| 651 | |
| 652 | if (!irq_fpu_usable()) { |
| 653 | struct ablkcipher_request *cryptd_req = |
| 654 | ablkcipher_request_ctx(req); |
| 655 | |
| 656 | memcpy(cryptd_req, req, sizeof(*req)); |
| 657 | ablkcipher_request_set_tfm(cryptd_req, &ctx->cryptd_tfm->base); |
| 658 | |
| 659 | return crypto_ablkcipher_decrypt(cryptd_req); |
| 660 | } else { |
| 661 | struct blkcipher_desc desc; |
| 662 | |
| 663 | desc.tfm = cryptd_ablkcipher_child(ctx->cryptd_tfm); |
| 664 | desc.info = req->info; |
| 665 | desc.flags = 0; |
| 666 | |
| 667 | return crypto_blkcipher_crt(desc.tfm)->decrypt( |
| 668 | &desc, req->dst, req->src, req->nbytes); |
| 669 | } |
| 670 | } |
| 671 | |
| 672 | static void ablk_exit(struct crypto_tfm *tfm) |
| 673 | { |
| 674 | struct async_serpent_ctx *ctx = crypto_tfm_ctx(tfm); |
| 675 | |
| 676 | cryptd_free_ablkcipher(ctx->cryptd_tfm); |
| 677 | } |
| 678 | |
Jussi Kivilinna | 435d3e5 | 2012-02-17 22:48:53 +0200 | [diff] [blame] | 679 | static int ablk_init(struct crypto_tfm *tfm) |
Jussi Kivilinna | 937c30d | 2011-11-09 16:26:25 +0200 | [diff] [blame] | 680 | { |
| 681 | struct async_serpent_ctx *ctx = crypto_tfm_ctx(tfm); |
Jussi Kivilinna | 435d3e5 | 2012-02-17 22:48:53 +0200 | [diff] [blame] | 682 | struct cryptd_ablkcipher *cryptd_tfm; |
| 683 | char drv_name[CRYPTO_MAX_ALG_NAME]; |
| 684 | |
| 685 | snprintf(drv_name, sizeof(drv_name), "__driver-%s", |
| 686 | crypto_tfm_alg_driver_name(tfm)); |
| 687 | |
| 688 | cryptd_tfm = cryptd_alloc_ablkcipher(drv_name, 0, 0); |
| 689 | if (IS_ERR(cryptd_tfm)) |
| 690 | return PTR_ERR(cryptd_tfm); |
Jussi Kivilinna | 937c30d | 2011-11-09 16:26:25 +0200 | [diff] [blame] | 691 | |
| 692 | ctx->cryptd_tfm = cryptd_tfm; |
| 693 | tfm->crt_ablkcipher.reqsize = sizeof(struct ablkcipher_request) + |
| 694 | crypto_ablkcipher_reqsize(&cryptd_tfm->base); |
Jussi Kivilinna | 937c30d | 2011-11-09 16:26:25 +0200 | [diff] [blame] | 695 | |
Jussi Kivilinna | 35474c3 | 2012-02-17 22:48:37 +0200 | [diff] [blame] | 696 | return 0; |
| 697 | } |
| 698 | |
| 699 | static struct crypto_alg serpent_algs[10] = { { |
| 700 | .cra_name = "__ecb-serpent-sse2", |
| 701 | .cra_driver_name = "__driver-ecb-serpent-sse2", |
| 702 | .cra_priority = 0, |
| 703 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 704 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
| 705 | .cra_ctxsize = sizeof(struct serpent_ctx), |
| 706 | .cra_alignmask = 0, |
| 707 | .cra_type = &crypto_blkcipher_type, |
| 708 | .cra_module = THIS_MODULE, |
| 709 | .cra_list = LIST_HEAD_INIT(serpent_algs[0].cra_list), |
| 710 | .cra_u = { |
| 711 | .blkcipher = { |
| 712 | .min_keysize = SERPENT_MIN_KEY_SIZE, |
| 713 | .max_keysize = SERPENT_MAX_KEY_SIZE, |
| 714 | .setkey = serpent_setkey, |
| 715 | .encrypt = ecb_encrypt, |
| 716 | .decrypt = ecb_decrypt, |
| 717 | }, |
| 718 | }, |
| 719 | }, { |
| 720 | .cra_name = "__cbc-serpent-sse2", |
| 721 | .cra_driver_name = "__driver-cbc-serpent-sse2", |
| 722 | .cra_priority = 0, |
| 723 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 724 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
| 725 | .cra_ctxsize = sizeof(struct serpent_ctx), |
| 726 | .cra_alignmask = 0, |
| 727 | .cra_type = &crypto_blkcipher_type, |
| 728 | .cra_module = THIS_MODULE, |
| 729 | .cra_list = LIST_HEAD_INIT(serpent_algs[1].cra_list), |
| 730 | .cra_u = { |
| 731 | .blkcipher = { |
| 732 | .min_keysize = SERPENT_MIN_KEY_SIZE, |
| 733 | .max_keysize = SERPENT_MAX_KEY_SIZE, |
| 734 | .setkey = serpent_setkey, |
| 735 | .encrypt = cbc_encrypt, |
| 736 | .decrypt = cbc_decrypt, |
| 737 | }, |
| 738 | }, |
| 739 | }, { |
| 740 | .cra_name = "__ctr-serpent-sse2", |
| 741 | .cra_driver_name = "__driver-ctr-serpent-sse2", |
| 742 | .cra_priority = 0, |
| 743 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 744 | .cra_blocksize = 1, |
| 745 | .cra_ctxsize = sizeof(struct serpent_ctx), |
| 746 | .cra_alignmask = 0, |
| 747 | .cra_type = &crypto_blkcipher_type, |
| 748 | .cra_module = THIS_MODULE, |
| 749 | .cra_list = LIST_HEAD_INIT(serpent_algs[2].cra_list), |
| 750 | .cra_u = { |
| 751 | .blkcipher = { |
| 752 | .min_keysize = SERPENT_MIN_KEY_SIZE, |
| 753 | .max_keysize = SERPENT_MAX_KEY_SIZE, |
| 754 | .ivsize = SERPENT_BLOCK_SIZE, |
| 755 | .setkey = serpent_setkey, |
| 756 | .encrypt = ctr_crypt, |
| 757 | .decrypt = ctr_crypt, |
| 758 | }, |
| 759 | }, |
| 760 | }, { |
| 761 | .cra_name = "__lrw-serpent-sse2", |
| 762 | .cra_driver_name = "__driver-lrw-serpent-sse2", |
| 763 | .cra_priority = 0, |
| 764 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 765 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
| 766 | .cra_ctxsize = sizeof(struct serpent_lrw_ctx), |
| 767 | .cra_alignmask = 0, |
| 768 | .cra_type = &crypto_blkcipher_type, |
| 769 | .cra_module = THIS_MODULE, |
| 770 | .cra_list = LIST_HEAD_INIT(serpent_algs[3].cra_list), |
| 771 | .cra_exit = lrw_exit_tfm, |
| 772 | .cra_u = { |
| 773 | .blkcipher = { |
| 774 | .min_keysize = SERPENT_MIN_KEY_SIZE + |
| 775 | SERPENT_BLOCK_SIZE, |
| 776 | .max_keysize = SERPENT_MAX_KEY_SIZE + |
| 777 | SERPENT_BLOCK_SIZE, |
| 778 | .ivsize = SERPENT_BLOCK_SIZE, |
| 779 | .setkey = lrw_serpent_setkey, |
| 780 | .encrypt = lrw_encrypt, |
| 781 | .decrypt = lrw_decrypt, |
| 782 | }, |
| 783 | }, |
| 784 | }, { |
| 785 | .cra_name = "__xts-serpent-sse2", |
| 786 | .cra_driver_name = "__driver-xts-serpent-sse2", |
| 787 | .cra_priority = 0, |
| 788 | .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER, |
| 789 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
| 790 | .cra_ctxsize = sizeof(struct serpent_xts_ctx), |
| 791 | .cra_alignmask = 0, |
| 792 | .cra_type = &crypto_blkcipher_type, |
| 793 | .cra_module = THIS_MODULE, |
| 794 | .cra_list = LIST_HEAD_INIT(serpent_algs[4].cra_list), |
| 795 | .cra_u = { |
| 796 | .blkcipher = { |
| 797 | .min_keysize = SERPENT_MIN_KEY_SIZE * 2, |
| 798 | .max_keysize = SERPENT_MAX_KEY_SIZE * 2, |
| 799 | .ivsize = SERPENT_BLOCK_SIZE, |
| 800 | .setkey = xts_serpent_setkey, |
| 801 | .encrypt = xts_encrypt, |
| 802 | .decrypt = xts_decrypt, |
| 803 | }, |
| 804 | }, |
| 805 | }, { |
| 806 | .cra_name = "ecb(serpent)", |
| 807 | .cra_driver_name = "ecb-serpent-sse2", |
| 808 | .cra_priority = 400, |
| 809 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 810 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
| 811 | .cra_ctxsize = sizeof(struct async_serpent_ctx), |
| 812 | .cra_alignmask = 0, |
| 813 | .cra_type = &crypto_ablkcipher_type, |
| 814 | .cra_module = THIS_MODULE, |
| 815 | .cra_list = LIST_HEAD_INIT(serpent_algs[5].cra_list), |
Jussi Kivilinna | 435d3e5 | 2012-02-17 22:48:53 +0200 | [diff] [blame] | 816 | .cra_init = ablk_init, |
Jussi Kivilinna | 35474c3 | 2012-02-17 22:48:37 +0200 | [diff] [blame] | 817 | .cra_exit = ablk_exit, |
| 818 | .cra_u = { |
| 819 | .ablkcipher = { |
| 820 | .min_keysize = SERPENT_MIN_KEY_SIZE, |
| 821 | .max_keysize = SERPENT_MAX_KEY_SIZE, |
| 822 | .setkey = ablk_set_key, |
| 823 | .encrypt = ablk_encrypt, |
| 824 | .decrypt = ablk_decrypt, |
| 825 | }, |
| 826 | }, |
| 827 | }, { |
| 828 | .cra_name = "cbc(serpent)", |
| 829 | .cra_driver_name = "cbc-serpent-sse2", |
| 830 | .cra_priority = 400, |
| 831 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 832 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
| 833 | .cra_ctxsize = sizeof(struct async_serpent_ctx), |
| 834 | .cra_alignmask = 0, |
| 835 | .cra_type = &crypto_ablkcipher_type, |
| 836 | .cra_module = THIS_MODULE, |
| 837 | .cra_list = LIST_HEAD_INIT(serpent_algs[6].cra_list), |
Jussi Kivilinna | 435d3e5 | 2012-02-17 22:48:53 +0200 | [diff] [blame] | 838 | .cra_init = ablk_init, |
Jussi Kivilinna | 35474c3 | 2012-02-17 22:48:37 +0200 | [diff] [blame] | 839 | .cra_exit = ablk_exit, |
| 840 | .cra_u = { |
| 841 | .ablkcipher = { |
| 842 | .min_keysize = SERPENT_MIN_KEY_SIZE, |
| 843 | .max_keysize = SERPENT_MAX_KEY_SIZE, |
| 844 | .ivsize = SERPENT_BLOCK_SIZE, |
| 845 | .setkey = ablk_set_key, |
| 846 | .encrypt = __ablk_encrypt, |
| 847 | .decrypt = ablk_decrypt, |
| 848 | }, |
| 849 | }, |
| 850 | }, { |
Jussi Kivilinna | 937c30d | 2011-11-09 16:26:25 +0200 | [diff] [blame] | 851 | .cra_name = "ctr(serpent)", |
| 852 | .cra_driver_name = "ctr-serpent-sse2", |
| 853 | .cra_priority = 400, |
| 854 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 855 | .cra_blocksize = 1, |
| 856 | .cra_ctxsize = sizeof(struct async_serpent_ctx), |
| 857 | .cra_alignmask = 0, |
| 858 | .cra_type = &crypto_ablkcipher_type, |
| 859 | .cra_module = THIS_MODULE, |
Jussi Kivilinna | 35474c3 | 2012-02-17 22:48:37 +0200 | [diff] [blame] | 860 | .cra_list = LIST_HEAD_INIT(serpent_algs[7].cra_list), |
Jussi Kivilinna | 435d3e5 | 2012-02-17 22:48:53 +0200 | [diff] [blame] | 861 | .cra_init = ablk_init, |
Jussi Kivilinna | 937c30d | 2011-11-09 16:26:25 +0200 | [diff] [blame] | 862 | .cra_exit = ablk_exit, |
| 863 | .cra_u = { |
| 864 | .ablkcipher = { |
| 865 | .min_keysize = SERPENT_MIN_KEY_SIZE, |
| 866 | .max_keysize = SERPENT_MAX_KEY_SIZE, |
| 867 | .ivsize = SERPENT_BLOCK_SIZE, |
| 868 | .setkey = ablk_set_key, |
| 869 | .encrypt = ablk_encrypt, |
| 870 | .decrypt = ablk_encrypt, |
| 871 | .geniv = "chainiv", |
| 872 | }, |
| 873 | }, |
Jussi Kivilinna | 35474c3 | 2012-02-17 22:48:37 +0200 | [diff] [blame] | 874 | }, { |
Jussi Kivilinna | 1848205 | 2011-11-09 16:26:36 +0200 | [diff] [blame] | 875 | .cra_name = "lrw(serpent)", |
| 876 | .cra_driver_name = "lrw-serpent-sse2", |
| 877 | .cra_priority = 400, |
| 878 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 879 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
| 880 | .cra_ctxsize = sizeof(struct async_serpent_ctx), |
| 881 | .cra_alignmask = 0, |
| 882 | .cra_type = &crypto_ablkcipher_type, |
| 883 | .cra_module = THIS_MODULE, |
Jussi Kivilinna | 35474c3 | 2012-02-17 22:48:37 +0200 | [diff] [blame] | 884 | .cra_list = LIST_HEAD_INIT(serpent_algs[8].cra_list), |
Jussi Kivilinna | 435d3e5 | 2012-02-17 22:48:53 +0200 | [diff] [blame] | 885 | .cra_init = ablk_init, |
Jussi Kivilinna | 1848205 | 2011-11-09 16:26:36 +0200 | [diff] [blame] | 886 | .cra_exit = ablk_exit, |
| 887 | .cra_u = { |
| 888 | .ablkcipher = { |
| 889 | .min_keysize = SERPENT_MIN_KEY_SIZE + |
| 890 | SERPENT_BLOCK_SIZE, |
| 891 | .max_keysize = SERPENT_MAX_KEY_SIZE + |
| 892 | SERPENT_BLOCK_SIZE, |
| 893 | .ivsize = SERPENT_BLOCK_SIZE, |
| 894 | .setkey = ablk_set_key, |
| 895 | .encrypt = ablk_encrypt, |
| 896 | .decrypt = ablk_decrypt, |
| 897 | }, |
| 898 | }, |
Jussi Kivilinna | 35474c3 | 2012-02-17 22:48:37 +0200 | [diff] [blame] | 899 | }, { |
Jussi Kivilinna | 5962f8b | 2011-11-09 16:26:41 +0200 | [diff] [blame] | 900 | .cra_name = "xts(serpent)", |
| 901 | .cra_driver_name = "xts-serpent-sse2", |
| 902 | .cra_priority = 400, |
| 903 | .cra_flags = CRYPTO_ALG_TYPE_ABLKCIPHER | CRYPTO_ALG_ASYNC, |
| 904 | .cra_blocksize = SERPENT_BLOCK_SIZE, |
| 905 | .cra_ctxsize = sizeof(struct async_serpent_ctx), |
| 906 | .cra_alignmask = 0, |
| 907 | .cra_type = &crypto_ablkcipher_type, |
| 908 | .cra_module = THIS_MODULE, |
Jussi Kivilinna | 35474c3 | 2012-02-17 22:48:37 +0200 | [diff] [blame] | 909 | .cra_list = LIST_HEAD_INIT(serpent_algs[9].cra_list), |
Jussi Kivilinna | 435d3e5 | 2012-02-17 22:48:53 +0200 | [diff] [blame] | 910 | .cra_init = ablk_init, |
Jussi Kivilinna | 5962f8b | 2011-11-09 16:26:41 +0200 | [diff] [blame] | 911 | .cra_exit = ablk_exit, |
| 912 | .cra_u = { |
| 913 | .ablkcipher = { |
| 914 | .min_keysize = SERPENT_MIN_KEY_SIZE * 2, |
| 915 | .max_keysize = SERPENT_MAX_KEY_SIZE * 2, |
| 916 | .ivsize = SERPENT_BLOCK_SIZE, |
| 917 | .setkey = ablk_set_key, |
| 918 | .encrypt = ablk_encrypt, |
| 919 | .decrypt = ablk_decrypt, |
| 920 | }, |
| 921 | }, |
Jussi Kivilinna | 35474c3 | 2012-02-17 22:48:37 +0200 | [diff] [blame] | 922 | } }; |
Jussi Kivilinna | 5962f8b | 2011-11-09 16:26:41 +0200 | [diff] [blame] | 923 | |
Jussi Kivilinna | 937c30d | 2011-11-09 16:26:25 +0200 | [diff] [blame] | 924 | static int __init serpent_sse2_init(void) |
| 925 | { |
Jussi Kivilinna | 937c30d | 2011-11-09 16:26:25 +0200 | [diff] [blame] | 926 | if (!cpu_has_xmm2) { |
| 927 | printk(KERN_INFO "SSE2 instructions are not detected.\n"); |
| 928 | return -ENODEV; |
| 929 | } |
| 930 | |
Jussi Kivilinna | 35474c3 | 2012-02-17 22:48:37 +0200 | [diff] [blame] | 931 | return crypto_register_algs(serpent_algs, ARRAY_SIZE(serpent_algs)); |
Jussi Kivilinna | 937c30d | 2011-11-09 16:26:25 +0200 | [diff] [blame] | 932 | } |
| 933 | |
| 934 | static void __exit serpent_sse2_exit(void) |
| 935 | { |
Jussi Kivilinna | 35474c3 | 2012-02-17 22:48:37 +0200 | [diff] [blame] | 936 | crypto_unregister_algs(serpent_algs, ARRAY_SIZE(serpent_algs)); |
Jussi Kivilinna | 937c30d | 2011-11-09 16:26:25 +0200 | [diff] [blame] | 937 | } |
| 938 | |
| 939 | module_init(serpent_sse2_init); |
| 940 | module_exit(serpent_sse2_exit); |
| 941 | |
| 942 | MODULE_DESCRIPTION("Serpent Cipher Algorithm, SSE2 optimized"); |
| 943 | MODULE_LICENSE("GPL"); |
| 944 | MODULE_ALIAS("serpent"); |